#include<stdio.h>
int main()
{
    char grade;
    printf("Please input your grade:");
    scanf("%c",&grade);
    switch(grade)
    {
        case 'A': printf("Your score at 85~100\n"); 
        break;
        case 'B': printf("Your score at 70~84\n");
        break;
        case 'C': printf("Your scor at 60~69\n");
        break;
        case 'D': printf("Your score at 0~59\n");
        break;
        default:printf("Input error!\n");
    }
    return 0;
}